Improvement in chimneys



. J. SPRAGUE.

Chimney.

Patented Sept. 13,1870.

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-FETERS, PHOTO-LITMOGRAPMR, WASHINGTON, Dv C:

ALVAH J. SPRAGUE, OF SPRINGFIELD, MISSOURI.

Letters Patent No. 107,421, dated September 13, 1 870.

IMPROVEMENT IN CHIMNEYS.

The Schedule referred to in these Letters Patent and making part of thesame To all whom it may concern Be it known that I, ALVAH J. SPRAGUE,'ofSpringfield, in the county of Greene and State of Missouri, haveinvented a new and useful Improvement in Fire- Flues or Chimneys and Ido hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the accompanying drawings, in which Figure 1 is a frontelevation;

Figure 2 is a central vertical section of one section of the flue, takenin line a: x of fig..3;

Figure 3 is a transverse section, taken in line y y offig. 1 and Figure4 is a vertical section taken in line see of fig. 1.

Like letters in dilferent figures ofthe drawings indicate like parts.

My invention consists of a metallic portable fireflue or chimney,constructed in sections, which are at atched together by slide-joints,the front, back, and side plates being attached together by means ofproper flanges, tongues, and grooves, so that the entire chimney may bereadily put together and taken apart for transportation; and it is soconstructed as that the size of the flue increases from the bottom tothe top, which increases the draught.

The bottom section is provided with an opening for attaching to theportable fire-place, and the top section is provided with capes, to shedthe water from the chimney, and prcvent'leaking through the roof.-

The front and back plates A Aare made with rabhets and tongues, tofitwithin the flanges and grooves in the side plates B B, as seen infig. 2, and all the plates are made with panels, as'shown in thedrawings, or they may be otherwise ornamented, as required.

Braces b l) are placed at each end of the sections for holding theplates together.

The sections are joined together by the slide-joints, as seen in fig. 4.

The first section is provided with an opening or throat,.O, as seenfigs. l and 4, for fitting on to the neck of the portable fire-place,and the top section is provided with capes or eaves D, to shed the rainfrom the chimney and prevent leaking through the roof.

E is a plate, secured by screws to the lower end of the first section,and forms the bottom of the flue, to catch the soot and ashes which mayaccumulate therein, and also serves to hold the plates in position; andF isthe cornice or ornamental cap attached to the top of the chimney.

This chimney may be transported in sections or in separate pieces, andis readily put together and attached to a stove or portable fire-placeproperly arrangedfor that purpose, and, being so constructed as that theflue increases in size from the bottom to the top, the draught is.thereby increased, and the operation of the chimney is improved.

When the space below the throat O is filled up with soot and ashes, thebottom plate E is readily reniovcd'and the flue cleaned out.

Having thus -fully described my invention,

\Vhat I claim therein as new, and desire to secure by Letters Patent,"is- The chimney A, so constructed as to have the size or diameter of theflue increase from the bottom to the top, suhstantially asv shown anddescribed.

As evidence that I claim'the foregoing, have hereunto set my hand in thepresence of two witnesses. a

' ALVAH J. SPRAGUE.

Witnessesz H. O. PARKER, G. R. ALLEN.

